Tyneham, Dorset, England - village evacuated in 1943, during the Second World War, and abandoned ever since.
Skara Brae, Orkney, Scotland - prehistoric village covered by a large sand dune, and only revealed in 1850.
Menlo Castle, Galway, Ireland - a ruined castle, shrouded in folklore and mystery.
Ladby Ship, Kerteminde, Denmark - the only Viking ship in the world still situated in the burial mound where it was placed 1000 years ago.
Our Dear Lord in the Attic, Amsterdam, Netherlands - a clandestine Catholic church, hidden in the attic of a four-century-old canal house in Amsterdam.
Montsegur, France - ruined castles where Cathars held out against persecution.
Kaisertal, Austria - home to a tiny community, this is the last inhabited valley in Austria to get a road link.
Black Forest, Germany - a lake only accessible by foot in the myth-laden Black Forest.
Rök Runestone, Ödeshög, Sweden - an encrypted Norse monolith that lay hidden in a church wall for over a millennium.
Villa of Tiberus, Sperlonga, Italy - The Roman Emperor's lost summer home along the Italian seashore.
Bulnes, Cabrales, Spain - village in the Picos de Europa mountain range, only accessible by hike or tram.
Lalibela, Ethiopia - underground, rock-hewn churches that stand as a remarkable testament to one of the oldest Christian traditions in the world.
Great Zimbabwe, Zimbabwe - the greatest sub-Saharan site that colonialists wanted to keep hidden.
Turpan Oasis, Turpan, China - a manmade oasis in the desert for Silk Road travellers.
Phnom Kulen, Siem Reap Province, Cambodia - a hidden Khmer temple and ruins, only recently rediscovered.
Yonaguni, Yaeyama Islands, Japan - mysterious submerged ruins estimated to be around 8,000 years old.
Mount Borradaile, Arnhem Land, Australia - Aboriginal-owned land, full of rock art sites, thought to have been first inhabited by humans over 45,000 years ago.
CurioBay, Southland, New Zealand - 160-million-year-old fossil forest, revealed at low tide.
Spirit Island, Alberta, Canada - a tucked away lake-isle, only accessible by boat.
The Green Mill, Chicago, United States - a prohibition-era jazz bar in Chicago, frequented by Al Capone, with tunnels allegedly underneath.
Havasu Canyon, Arizona, United States - a Native American village hidden in Grand Canyon, accessible on foot or mule.
PlymouthChurch of the Pilgrims, New York, United States - a church used by the Underground Railroad, a network by which slaves escaped to freedom.
Actun Tunichil Muknal, Belize - an Inca city undiscovered by the Spanish, like a lesser-known Machu Picchu.
Choquequirao, Peru - a jungle-shrouded cave, purported to be a gateway to the Mayan underworld.
El Mirador, El Petén, Guatemala - a remote Mayan city still hidden in the jungle.
